TY  - BOOK
AU  - Biggs, Norman
AU  - 
TI  - Interaction models; course given at Royal Holloway college, Univ. of London, Oct.- Dec. 1976
T2  - London Mathematical Society lecture note series
U1  - 530.2 
PY  - 1977///
CY  - Cambridge
PB  - Cambridge University Press
ER  -